Publicis And Omnicom Become World's Biggest Advertising Company

Caption:Maurice Levy, chief executive officer of Publicis Groupe SA, left, and John Wren, chief executive officer of Omnicom Group Inc., exchange pens while signing the merger during a news conference held on the rooftop of the Publicis headquarters in Paris, France, on Sunday, July 28, 2013. Publicis Groupe SA and Omnicom Group Inc. agreed to merge in an all-stock transaction to create the world's largest advertising company with $23 billion in revenue, toppling market leader WPP Plc. Photographer: Balint Porneczi/Bloomberg via Getty Images

Caption:

Maurice Levy, chief executive officer of Publicis Groupe SA, left, and John Wren, chief executive officer of Omnicom Group Inc., exchange pens while signing the merger during a news conference held on the rooftop of the Publicis headquarters in Paris, France, on Sunday, July 28, 2013. Publicis Groupe SA and Omnicom Group Inc. agreed to merge in an all-stock transaction to create the world's largest advertising company with $23 billion in revenue, toppling market leader WPP Plc. Photographer: Balint Porneczi/Bloomberg via Getty Images

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